Perhaps you should try some spelling variations:
"synchronism swimming" » "synchronising swimming", "synchronism stemming"
"synchronismd swimming" » "synchronisingd swimming", "synchronismd stemming", "synchronising swimming"
"synchronized swimming" » "synchronized stemming", "synchronizingd swimming"
"synchronize swimming" » "synchronize stemming", "synchronizing swimming"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("synchronism swimming") OR ("synchronized swimming"))) or ("synchronize swimming"))) or ("synchronismd swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("synchronism swimming") OR ("synchronized swimming"))) OR ("synchronize swimming"))) OR ("synchronismd swimming")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"synchronism swimming\") OR (\"synchronized swimming\"))) or (\"synchronize swimming\"))) or (\"synchronismd swimming\"))".
• Removing quotes may allow a broader search: (((((( synchronism swimming ) OR ( synchronized swimming ))) or ( synchronize swimming ))) or ( synchronismd swimming )).
• Adding a wildcard symbol may retrieve word variants: (((((("synchronism swimming") OR ("synchronized swimming"))) or ("synchronize swimming"))) or ("synchronismd swimming"))*.